🎉 Year-end promotion starts now! Get FREE SHIPPING sitewide until Nov. 28th.





Up to 1 A switching regulator with adjustable current limit

Quantity $ per Unit Savings
1 - 9$3.370%
10 - 24$3.0310%
25 - 90$2.8615%
Contact Sales
In stock
Parameter NameParameter Value
Input Voltage Min Volt8.0
Input Voltage Max Volt36.0
Packing TypeTube
RoHs compliantEcopack2
Package NameSO-8

The L6902D is a complete and simple step down switching regulator with adjustable current limit.

Based on a voltage mode structure it integrates a current error amplifier to have a constant voltage and constant current control.

By means of an on board current sense resistor and the availability of the current sense pins (both compatible to Vcc and for Cs- compatible with GND too) a current limit programming is very simple and accurate (±5%). Moreover constant current control can be used to charge NiMH and NiCd batteries.

The device can be used as a standard DC/DC converter with adjustable current limit (set by using the external sense resistor).

The internal robust P-channel DMOS transistor with a typical of 250 mΩ assures high efficiency and a minimum dropout even at high output current level. The internal limiting current (latched function) of typical value of 2.5 A protects the device from accidental output short circuit avoiding dangerous loads damage.

If the temperature of the chip goes higher than a fixed internal threshold (150°C with 20°C hysteresis), the power stage is turned off.

Other protections beside thermal shutdown complete the device for a safe and reliable application: overvoltage protection, frequency folback overcurrent protection and protection vs. feedback disconnection.

The internal fixed switching frequency of 250KHz, and the SO-8 package pin allow to built an ultra compact DC/ DC converter with a minimum board space.

Key features
  • Up to 1 A output current
  • Operating input voltage from 8 V to 36 V
  • Precise 3.3 V (±2%) reference voltage
  • 5 % output current accuracy
  • Output voltage adjustable from 1.235 V to 34 V
  • 250 kHz internally fixed frequency
  • Voltage feedforward
  • Zero load current operation
  • Adjustable current limit
  • Protection against feedback Disconnection
  • Thermal shutdown